Add Keychron C1 Pro V2 (#24899)

* Add C1 Pro V2

* Remove default values for f401xC generic board definition

* Update clang and copyright years

* Add version description

1 files changed, 104 insertions, 0 deletions

diff --git a/keyboards/keychron/c1_pro_v2/c1_pro_v2.c b/keyboards/keychron/c1_pro_v2/c1_pro_v2.c
new file mode 100644
index 0000000000..d4ff5eb9dc
--- /dev/null
+++ b/keyboards/keychron/c1_pro_v2/c1_pro_v2.c
@@ -0,0 +1,104 @@
+/* Copyright 2025 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "quantum.h"
+
+#ifdef DIP_SWITCH_ENABLE
+bool dip_switch_update_kb(uint8_t index, bool active) {
+    if (!dip_switch_update_user(index, active)) {
+        return false;
+    }
+    if (index == 0) {
+        default_layer_set(1UL << (active ? 0 : 2));
+    }
+    return true;
+}
+#endif
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+    if (!process_record_user(keycode, record)) {
+        return false;
+    }
+    switch (keycode) {
+#ifdef RGB_MATRIX_ENABLE
+        case QK_RGB_MATRIX_TOGGLE:
+            if (record->event.pressed) {
+                switch (rgb_matrix_get_flags()) {
+                    case LED_FLAG_ALL: {
+                        rgb_matrix_set_flags(LED_FLAG_NONE);
+                        rgb_matrix_set_color_all(0, 0, 0);
+                    } break;
+                    default: {
+                        rgb_matrix_set_flags(LED_FLAG_ALL);
+                    } break;
+                }
+            }
+            if (!rgb_matrix_is_enabled()) {
+                rgb_matrix_set_flags(LED_FLAG_ALL);
+                rgb_matrix_enable();
+            }
+            return false;
+#endif
+#ifdef LED_MATRIX_ENABLE
+        case QK_LED_MATRIX_TOGGLE:
+            if (record->event.pressed) {
+                switch (led_matrix_get_flags()) {
+                    case LED_FLAG_ALL: {
+                        led_matrix_set_flags(LED_FLAG_NONE);
+                        led_matrix_set_value_all(0);
+                    } break;
+                    default: {
+                        led_matrix_set_flags(LED_FLAG_ALL);
+                    } break;
+                }
+            }
+            if (!led_matrix_is_enabled()) {
+                led_matrix_set_flags(LED_FLAG_ALL);
+                led_matrix_enable();
+            }
+            return false;
+#endif
+        default:
+            return true;
+    }
+}
+
+void keyboard_post_init_kb(void) {
+    gpio_set_pin_output_push_pull(LED_MAC_OS_PIN);
+    gpio_set_pin_output_push_pull(LED_WIN_OS_PIN);
+    gpio_write_pin(LED_MAC_OS_PIN, !LED_OS_PIN_ON_STATE);
+    gpio_write_pin(LED_WIN_OS_PIN, !LED_OS_PIN_ON_STATE);
+
+    keyboard_post_init_user();
+}
+
+void housekeeping_task_kb(void) {
+    if (default_layer_state == (1U << 0)) {
+        gpio_write_pin(LED_MAC_OS_PIN, LED_OS_PIN_ON_STATE);
+        gpio_write_pin(LED_WIN_OS_PIN, !LED_OS_PIN_ON_STATE);
+    }
+    if (default_layer_state == (1U << 2)) {
+        gpio_write_pin(LED_MAC_OS_PIN, !LED_OS_PIN_ON_STATE);
+        gpio_write_pin(LED_WIN_OS_PIN, LED_OS_PIN_ON_STATE);
+    }
+}
+
+void suspend_power_down_kb(void) {
+    gpio_write_pin(LED_WIN_OS_PIN, !LED_OS_PIN_ON_STATE);
+    gpio_write_pin(LED_MAC_OS_PIN, !LED_OS_PIN_ON_STATE);
+
+    suspend_power_down_user();
+}